Siemens AC75 User Manual

AC75 AT Command Set

7.18 +++

AC75_ATC_V01.002

Page 176 of 569

10/30/06

Confidential / Released

7.18

+++ Switch from data mode to command mode

Syntax

Command Description

This command is only available during a CSD call or a GPRS connection. The +++ character sequence causes

the TA to cancel the data flow over the AT interface and switch to command mode. This allows you to enter AT

commands while maintaining the data connection to the remote device or, accordingly, the GPRS connection.

To prevent the +++ escape sequence from being misinterpreted as data, it must be preceded and followed by a

pause of at least 1000 ms. The +++ characters must be entered in quick succession, all within 1000 ms.

Notes

• To return from command mode to data or PPP online mode: Enter

• In Multiplex mode the +++ sequence does not work. Therefore, if required in Multiplex mode, the escape

sequence needs to be implemented in the customer's external Multiplex application. Design solutions, for

example using the DTR signal or a modem status command (MSC), can be found in

, Section "Escape

• On ASC1 the +++ sequence can be used in GPRS connections for switching from PPP online to command

mode.

Exec Command

+++

Response(s)

Reference(s)

ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge

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